Silicone-carbonate resins



United States Patent 3,338,869 SILICONE-CA BONATE RESINS Loren A. Haluska, Midland, Mich., assignor to Dow Corning Corporation, Midland, Mich., a corporation of Michigan No Drawing. Filed Jan. 17, 1966, Ser. No. 520,903 7 Claims. (Cl. 260-465) This invention relates to new and improved carbonatecontaining silicone resins. More particularly it relates to carbonate-containing silicones which possess improved electrical and mechanical properties, high heat distortion temperatures and unusually high impact strengths.

By the term carbonate-containing silicone resins is meant silanes and siloxanes which possess characteristic carboxyl dioxy linkages mula:

(A) M R OCOR'SlXa-n wherein R is any monovalent hydrocarbon or halohydrocarbon radical,

R is any divalent hydrocarbon or hydrocarbon ether radical,

R" is any monovalent hydrocarbon or halohydrocarbon radical,

X is any hydrolyzable substitutent or hydroxyl radical,

n has a value of from 0 to 2 inclusive.

This invention also relates to a siloxane of the general formula ROCOR SiO wherein R, R, R", and n are as defined above.

This invention further relates to a siloxane polymer containing at least one unit of the Formula B; any other units present being of the general formula wherein Z is a monovalent hydrocarbon or halohydrocarbon radical and a has a value of from 0 to 3 inclusive.

Thus, for purposes of this invention, R in the above formulae can be any monovalent hydrocarbon or halohydrocarbon radical such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, dodecyl, octadecyL myricyI, pentyl, isopentyl, hexyl, isohexyl, cyclohexyl, cyclopentyl, methylcyclohexyl, hexylcyclohexyl, cyclobutyl, cyclohexenyl, vinyl, allyl, methallyl, hexenyl, octadecenyl, fi-phenylpropyl, ,B-phenylethyl, benzyl, chlorobenzyl, iodo-fl-phenylpropyl, chloromethyl, chlorobutyl, bromopropyl, 3,3,3-trifluoropropyl, gamma-chloropropyl, (perfluoroethyl)ethyl, (perfluoropentyl)ethyl, (perfluorononyl)ethyl, iodophenyl, a,a,a-trifluorotolyl, perfiuorocyclohexenyl, phenyl, tolyl, xylyl, ethylphenyl, mesityl, methyl-ethyl-phenyl, n-propylphenyl, propylphenyl, isopropylphenyl, diethylphenyl, propylmethylphenyl, ethyltrimethylphenyl, diethylmethylphenyl, hexylphenyl, cyclohexylmethylphenyl, amylmethylphenyl, butylethylphenyl, butyldimethylphenyl, propylethylmethylphenyl, diphenyl, dipropylphenyl, naphthyl, l-methylnaphthyl, Z-methylnaphthyl, 1 ethylnaphthyl, 2 ethylnaphthyl, phenylnaphthyl, anthracyl, 9-methylanthracyl, 2,3-dimethylanthracyl, 2,4-dimethy-lanthracyl, 9-ethylanthracyl, bromophenyl, o-bromophenyl, o-bromotolyl, m-bromotolyl, p-bromotolyl, o-chlorotolyl, m-chlorotolyl, pchlorotolyl, 2-chloro-m-fluorotolyl, 2,6-chlorotolyl, 4- bromo-o-xylyl, dichloroxylyl, 5-bromo-rn-Xylyl, 2-bromop-Xylyl, 2-bromomesityl, 3-bromo-o-tolyl, Z-bromo-lethylphenyl, 4-brom0-1,3-diethylphenyl, 4-bromo-l-tertiary-butylphenyl, 6-bromo-3-ethyltolyl, 2-bromo-4-ethyltolyl, 4-bromo-1-propylphenyl, 4-bromo-1-isopropylphenyl, 4-bromo-l-methyl-3-isopropylphenyl, 4-bromol-tertiaryamylphenyl, chlorophenyl, alpha-bromophenyl, 2-chloronaphthyl, 1-bromo-3-chloronaphthyl, 2-chlorol-methylnaphthyl, 1-bromo-8-methylnaphthyl, l-bromo- 2,3-dimethylnaphthyl, 1-bromo-4-methylnaphthyl, 1,10- dibromo-anthracyl, 9,10-dichloroanthracyl, phenanthryl, 3 methylphenanthryl, and 1,4 dirnethylphenanthryl, among others.

R can be any divalent hydrocarbon or hydrocarbon ether radical containing from 1 to 18 carbon atoms such as methylene, ethylene, propylene, hexylene, phenylene, isopropylene, Xenylene, decylene, octadecylene, 2,5-0cty1- ene, biphenylene, naphthalene, 2-phenylpropylene, 2- phenylethylene, and

among others.

R" can be any monovalent hydrocarbon of halohydrocarbon represented by the examples listed above for R.

X is defined as any hydrolyzable substituent or hydrolyzable radical. Therefore, R can be any alkoxy radical of from 1 to 4 carbon atoms such as methoxy, ethoxy, propoxy, isopro-poxy, butoxy or isobutoxy; X can also be any halogen atom such as chlorine, bromine, fluorine, or

iodine; X can also be any acyloxy radical such as acetoxy, propionate, butyrate, benzoate, or naphthanate; X can also be any oxime radical of the general formula nomic and qualitative viewpoint, a 1 percent solution of chloroplatinic acid is preferred.

It is to be noted that the silanes and siloxanes of this invention can also be prepared by reacting a compound of the formula wherein R is a hydrocarbon radical of from 1 to 4 carbon 5 HOB/six atoms such as methyl, ethyl, propyl, isopropyl, butyl, and isobutyl; X can also be any aryloxy radical such as l fi XYIOXY ZPheHYIethXMXY and naphthyloxy- In with the appropriate chloroformate to produce a comaddrtron, X can also be any amine of the general formulae pound of the formula (RNH), (NH and (R N-), wherein R is as defined above. 3

Z can be any monovalent hydrocarbon or halohydro- RQOOR'SiX gzrobltgn radical represented by the examples listed for R It to be note'd in the abofe reactit-m, X is as The silanes and siloxanes of this invention can be preprivllously dtescnbed 3 3 i gf z l ffi f p a aogenaomoro er yroyza era rca a is-repared by reactmg a compound of the formula active with the attached carbonate group. The above de- (ROCOA) fined reaction is conducted in the presence of any of the commonly known I-ICl acceptors such as pyridine to form the salt of hydrochloric acid to prevent any reversibility in the reaction and to etfectively dispense with the wherein R is as defined above and A is a terminally un- HCl that is necessarily evolved. saturated halohydrocarbon or hydrocarbon radical with In all reactions disclosed herein, temperature is not a silane or siloxane which contains silicon bonded hydrocritical, however elevated temperatures will accelerate gen atoms. For example, the reaction can be represented the reaction. It is to be further noted that both pressure by the following structural formulae: and proportion of the required reactants is likewise not critical. All reactions defined above are ty-pified in the (1) examples that follow.

ROCOA HS1X -n ROCOR'SlXa-n The following examples are intended to aid those 9, skilled in the art in understanding and practicing this invention. The examples do not delineate the scope of the and invention.

Example 1 (2) t l A 1 liter 3 necked flask equipped with a stirrer re a a RMHJOA t g ROOOR tg flux condenser, thermometer, and dropping tunnel was 2 2 loaded with 183.3 grams of The siloxanes of this invention can also be prepared [HOCHOHaOKJHQaSthO by hydrolyzing and condensing the novel silanes disclosed Ha (0H9, herein which contain X substituents that are hydrolyzab-le 40 or hydroxyl radicals. Said hydrolysis and condensation grams of Pyfldlne, and 300 of P 133-7 reaction is well known in the art as revealed by numerous grams of allylchloroformate Was then added 3 Period United States patents. of approximately one hour. The reaction mixture was The preparation of the novel silanes and siloxanes 'of cooled and gTan 1S of allylchlofoformate was the present invention occurs in the presence of catalytic p Strip distillatloll afi'orded 222-3 grams of the -platinum,-preferably in the form of chloroplatinic acid. Product The catalyst is employed with a solvent suitable for the purpose, such as xylene, hexane, and dimethyl p'hthalate [OH=CHOHO C O (IJHGHPMOHD'SHO among others, although Xylene is to be preferred. Concen- 1 (CH1): tration of the catalytic platinum is not critical with the exception that a sufficient quantity must be used. Any Example 2 amount in a range of from .25 to 10 percent chloroplatinic When the following siloxanes are substituted for the acid based on the weight of solvent can be effectively siloxane of Example 1, the indicated products are obemployed, although for best results, both from an ecotained.

Siloxane Product CH=CH2 CH=CHI [HOCHzCHzCHaSiIaO [CHFCHCHzOfiOOHaCHaCHz 11:0 CH: O (1H8 I (2) [HOCHaCEhCHaCHzSlihO (3) [HO CH:CHCHaSl-Oh-Sl 0 CH8 CH3 OCH: CH3 0 CH CH3 CH1 5. Example 3 When the following formates are substituted -for the allylohloroformate of Example 1, the following products are obtained.

Formats Product (1) ClCOO(CHn)aOHa (2) 01000011; [CH;OC--OCHCHO(CH;)3S1]:O

('l H; (CH3), (3) 0100001: [CG1 O-C0OHCHr-O(CHmSihO I JHa a):

wmwHmo- -w morn-o 0119881110 Example 4 A 1 liter, B-necked flask equipped with a stirrer, reflux condenser, thermometer, and dropping funnel was loaded with 142.2 grams of diallyl carbonate and 3.0 grams of a 1 percent solution of H PtCl The solution was heated to 132 C., and 129.2 grams of (HOHaSD O was added. A strip distillation afiord'ed 212.1 grams of the product Example 5 0 cH,=0 0H,0 !!-ocmcmomsuoomh a 31.1 percent yield of theory.

Example 6 When the following compounds are substituted for the corresponding compounds in Example 5, the indicated 4 s'ilanes are obtained.

Carbonate Silane Resulting Silane (l) CICHQCHQCHZOHIO(%OCH2CH=OH2 HSiOH OICHQCH CHzCHzOfiO'CHzCHrCHaSiOH (CHnCHaCHgBI): (CHnCHjCHgBI) SiCh (2) CHaCHaOHOCOCHaCH=CHI H8101: oHtoHlcrrogocmcmcmcmcm CHzCH: O

I? II (3) CH O|COCHzCHnO=CHg HSi(OCCH )g CHgOfiOCHgCHjCHCHgSKOCCH|)| A I o (4) HCHzOHaCHaCHaCHz- :)I]3 HCHQCHICHHCHACHA E m m 0 O 1C1 O CHICHIOHIOH=CHI CH:CH1CH:CH1CHgSl[N(CH3);]:

Carbonate Siloxane Resulting Siloxane CHZCHZCHQCHIOH: SiO 3 CHOCOCHiCH:CH'=CHz Hsio 011,0ooanionicmomomcmomomom I l l I (4) CH CHflIJHOHgO $5 0 HSiOm CHaCHflEHCHaO (i0 CHQCHfl F O F CH2CH=CH CHzSlOm (I3 I a' I a) a\ 01 H (CHrh-OCOCIEHCHCHaCHCH;

CH3 lo mas cmomomongon a F CH: 100

CH=CH2 (6) CHaOH2CHnO(fi-O HSIlO CHaCH2CH20([3-O CHzCHa CHzCHCH: SiO

CH1CH=CHz I CHaHzCfHCHs (7) CH3CHCH3OC-O H810 CHaCHCHzO-(fi-OCHaCH:

CH 0 CuHzs H3 0 CH=CH2 SIIO CmHn O (8) CHaCHzOHaCHgCHrO--(l-CHzCH2OH=CHg HSiO CHaCH2CHzCHgCH O(I] O CHgCHgCHzCHgSiO Example 8 0 R'Q. When the following siloxane is substituted for the R0& ole S50 siloxane of Example 1, the indicated product is obtained:

(2) siloxanes of the formula fl I I ROOOR S10 n ,and

(3) a siloxane copolymer containing at least one unit of the formula the remaining units present being of the formula in above said formulae R is a monovalent hydrocarbon or halohydrocarbon radical, R is a divalent hydrocrabon radical containing from 1 to 18 carbon atoms or hydrocarbon ether radical containing from 1 to 18 carbon atoms and containing one oxygen atom, R" is a monovalent hydrocarbon or halohydrocarbon radical, X is any hydrolyzable substituent or hydroxyl radical, Z is a monovalent hydrocarbon or halohydrocarbon radical, n has a value of from 0 to 2 inclusive, and a has a value of from 0 to 3 inclusive.

2. A silicon containing material as recited in claim 1 which is a silane of the Formula 1.

3. A silicon containing material as recited in claim 2 which is a silane of the formula 4. A silicon containing material as recited in claim 1 which is a siloxane of the Formula 2.

11 12 5. A silicon containing material as recited in claim 4 (CHQF -l which 1s a srloxane of the formula CHFOH GHQO }5 0 i- L i1oo 0H CH 5 Y a 3 References Cited CH1=CHOH10-C-O(CHa)aSlO-Si(CH1)zO-OOCHgCH=OH1 1| 1| FOREIGN PATENTS 607,440 7/1960 Canada. 822,101 11/1961 Great Britain. 941,957 11/1963 Great Britain.

949,126 2/1964 Great Britain. 955,916 4/1964 Great Britain.

6. A silicon containing material as recited in claim 1 15 DONALD E. CZAJA, Primary Examiner. which is a siloxane polymer of the Formula 3.

7. A silicon containing material as recited in claim 6 LEON BERCOVITZ Examiner which is a siloxane polymer of the formula M. L MARQUIS, Assistant Examiner 

1. A SILICON CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF, (1) SILANES OF THE FORMULA 